10 Calories to kJ

The working

Shown to 2 decimal places, as the app shows it. One food Calorie (kcal) is 4.184 kilojoules.

kJ, Calories and kcal

Calories are the unit most recipes and fitness apps use. A food Calorie, written Cal here and also called kcal, is 4.184 kJ, and kilojoules (kJ) are what many food labels show. 10 Cal is 41.84 kJ, so a tracker that says 10 Cal and a label that says 41.84 kJ describe the same energy.

This is a small amount of energy, closer to a single piece of fruit or a drink than to a meal.

For scale, half of this amount is 5 Cal, which is 20.92 kJ. Twice it is 20 Cal, which is 83.68 kJ.

Foods with about this much energy

• About 1.5 × a stalk of celeryOne serving is 6 Cal (25.1 kJ).
• About 2 × an espressoOne serving is 5 Cal (20.92 kJ).
• About 45% of a tomatoOne serving is 22 Cal (92.05 kJ).

These are everyday single-serving estimates from the app's food list, not nutrition labels. Recipes and portions vary. See the whole list.

Walking guide

1 to 4 min of walking.

Adult reference guide: 45 to 120 kg at a reference walking pace. Actual times may be outside this range. The exercise page lists the other activities.

Nearby values

• 20 Cal is 83.68 kJ
• 25 Cal is 104.6 kJ

• Next: 20 Cal
• The other way: 50 kJ to Calories
• All conversions